Device for giving positive motion to sliders of printing-presses



( Q J H. ORANSTONi Device for Giving Positive Motibnto Sliders ofPri-nting Presses. NO. 237,254. Patented Feb. 1,188].

UNITED STATES PATENT OFFICE.

JOHN H. CRANSTON, OF NORWICH, CONNECTICUT.

DEVICE FOR GIVING POSITIVE MOTION TO SLIDERS 0F PRlNTlNG-PRESSES.

SPECIFICATION forming part of Letters Patent No. 237,254, dated February1, 1881.

Application filed June 8, 1880.

To all whom it may concern:

Be it known that I, JOHN H. GRANSTON, a citizen of the United States,residing at Norwich, in the county of New London and State ofConnecticut, have invented certain new and useful Improvements inPrinting-Presses and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

This invention relates to an improvement in the means employed forgiving to the reciprocating sliders of printing-presses a steady,regular, positive'movement as they move back and forth upon the ways,and this object is accomplished by attaching to the bottom of the bedone end of a series of connected levers, the opposite end of said seriesbeing connected with the frame of the press and the center thereofattached to the slider.

In the drawings, Figure 1 is a vertical section through the bed andframe on the line was of Fig. 2. Fig. 2 is a plan, and Figs. 3 and 4show enlarged views of parts of the machine.

The frame which carries the operating parts of the press may be formedof a bed-plate, A, carrying two side frames, B B. Projecting inward fromthese side frames are the supports a a, which carry the channeled orgrooved ways C C, and are connected to each other by the cross-bars b b,the whole forming a sub stantial framing for the support of theoperative mechanism.

Within the channels of the grooved ways are placed the sliders D D,which consist of channel-bars having an H-shaped section, and ofsuflicient length to always remain under and support the whole length ofthe bed E during its reciprocations.

Mortises are formed through the web which connects the two side flangesof the sliders, in which are placed a series of rollers, c, of slightlyless diameter than the depth of the slider, but so pivoted within themortises that their peripheries shall project sufficiently be low thelower edge of the slider as to keep it clear of the bottom of thegrooves in the ways C and sufficiently below the upper edge of theflanges of the sliders as to leave a channel for the reception of the,guide projections d upon the bottom of the bed.

(No model.)

It will thus be seen that the bed is supported during its reciprocationswholly by the rollers c in the sliders, the. latter serving, by

means of their flanges, to prevent lateral mo-,

tion of the bed.

Attached to the under side of the slider D, on one side of the press,and projectingdownward therefrom, is the lug F, near the lower end ofwhich is pivoted the center of a series of links, 6, and levers 0. Oneend of the series is secured by a pivotal connection to the stud I,which is, in turn, secured to one of the ways C, and the. other end tothe lug F, projecting downward from the bed E. It is obvious that moreor less of these links 0 and levers 6 may be employed, if desired, andthat they may be attached at one end to any part of the reciprocatingbed and at the other to any stationary part of the press, the center ofthe series being attached to the slider, which will allow them to havetheir proper movements. The object sought in their use is to give apositive and steady motion to the sliders, and through them to the bed,which is actuated by suitable power in any well-known manner.

The sliders D D are connected by meansof a bar, which is secured firmlyat one end to one of the sliders and engages with the other by means ofa mortise formed therein, whereby the sliders are caused to movetogether.

I am aware that the sliders provided with a series of rollers forreducing the friction of the reciprocating bed have been heretoforeused, and that a series of levers have also been used to give a regularmotion to the bed. I do not therefore claim the same as myinvention; but

What I do claim, and desire to secure by Letters Patent, is-- In aprinting-press, the combination of the reciprocating bed, the slidersprovided with a series of rollers, and the system of links and leversconnecting the bed and the sliders with the press-frame, substantiallyas shown and described.

In testimony whereof I afflx my signature in presence of two witnesses.

JOHh H. CBANSTON.

Witnesses:

LUoIUs BROWN, LYDIA W. HoUGH.

